Future Windows Phones will have a lot less integration with social networks than the current version, which is a pity, as the integration allows some nifty tricks, including apparently bypassing the great firewall of China.
China’s internet access to the rest of the world is heavily filtered, and this includes blocking Facebook and Twitter. It seems Microsoft’s Live services are however not blocked, and on Windows Phones these act as a proxy to the integrated services such as Facebook and Twitter.
This is useful for visitors, but of course residents of China will purchase handsets which integrate with local services such as Tencent. It is however still a pity that future versions of Windows Phone will likely not offer this fringe benefit.